Qt: does “new without delete” cause memory leaks with controls?

Question

I was looking at Qt example here:

and inside the constructor, they have:

 Window::Window()
 {
     editor = new QTextEdit();   // Memory leak?
     Q         


        

Answer 1

If there is an exception thrown between new and addWidget then yes there is a memory leak. Otherwise the parent control takes ownership of the memory.

QHBoxLayout *buttonLayout = new QHBoxLayout();  // Memory leak?
//make sure you don't throw here
buttonLayout->addWidget(sendButton);